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arXiv · 1706.07695

Nanoscale Magnetic Imaging using Circularly Polarized High-Harmonic Radiation

Ofer Kfir·Sergey Zayko·Christina Nolte·Murat Sivis·Marcel Möller·Birgit Hebler·Sri Sai Phani Kanth Arekapudi·Daniel Steil·Sascha Schäfer·Manfred Albrecht·Oren Cohen·Stefan Mathias·Claus Ropers
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Abstract

This work demonstrates nanoscale magnetic imaging using bright circularly polarized high-harmonic radiation. We utilize the magneto-optical contrast of worm-like magnetic domains in a Co/Pd multilayer structure, obtaining quantitative amplitude and phase maps by lensless imaging. A diffraction-limited spatial resolution of 49 nm is achieved with iterative phase reconstruction enhanced by a holographic mask. Harnessing the unique coherence of high harmonics, this approach will facilitate quantitative, element-specific and spatially-resolved studies of ultrafast magnetization dynamics, advancing both fundamental and applied aspects of nanoscale magnetism.

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Ofer Kfir, Sergey Zayko, Christina Nolte, Murat Sivis, Marcel Möller, Birgit Hebler, Sri Sai Phani Kanth Arekapudi, Daniel Steil, Sascha Schäfer, Manfred Albrecht, Oren Cohen, Stefan Mathias, Claus Ropers. 2017-06-23. Nanoscale Magnetic Imaging using Circularly Polarized High-Harmonic Radiation. https://arxiv.org/abs/1706.07695

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